Connections for car wheels (5)
I believe the answer is:
axles
'connections for car wheels' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for axles that I've seen before include "They may be involved in turning" , "Shafts of wheels" , "Wheel shafts" , "Wheel rods" , "Rods between wheels" .)